Static quark-antiquark free energy and the running coupling at finite temperature
Static quark-antiquark free energy and the running coupling at finite temperature
We analyze the free energy of a static quark-antiquark pair in quenched QCD at short and large distances. From this we deduce running couplings, ${g}^{2}$ ($r$, $T$), and determine the length scale that separates at high temperature the short distance perturbative regime from the large distance nonperturbative regime in the …